tree-wide: remove Emacs lines from all files This should be handled fine now by .dir-locals.el, so need to carry that stuff in every file.

tree-wide: sort includes Sort the includes accoding to the new coding style.

util-lib: split out hex/dec/oct encoding/decoding into its own file

util-lib: split out fd-related operations into fd-util.[ch] There are more than enough to deserve their own .c file, hence move them over.

tree-wide: there is no ENOTSUP on linux Replace ENOTSUP by EOPNOTSUPP as this is what linux actually uses.

journal: have a named enum ObjectType

journal: consistently use OBJECT_<type> names instead of numbers Note that numbers 0 and -1 are both replaced with OBJECT_UNUSED, because they are treated the same everywhere (e.g. type_to_context() translates them both to 0).

journal: consistently allow type==0 to mean "any type" If type==0 and a non-NULL object were given as arguments to journal_file_hmac_put_object(), its object type check would fail and it would return -EBADMSG. All existing callers use either a positive type or -1. Still, for behavior consistency with journal_file_move_to_object() let's allow type 0 to pass.

treewide: use log_*_errno whenever %m is in the format string If the format string contains %m, clearly errno must have a meaningful value, so we might as well use log_*_errno to have ERRNO= logged. Using: find . -name '*.[ch]' | xargs sed -r -i -e \ 's/log_(debug|info|notice|warning|error|emergency)\((".*%m.*")/log_\1_errno(errno, \2/' Plus some whitespace, linewrap, and indent adjustments.

util: replace close_nointr_nofail() by a more useful safe_close() safe_close() automatically becomes a NOP when a negative fd is passed, and returns -1 unconditionally. This makes it easy to write lines like this: fd = safe_close(fd); Which will close an fd if it is open, and reset the fd variable correctly. By making use of this new scheme we can drop a > 200 lines of code that was required to test for non-negative fds or to reset the closed fd variable afterwards.

log: log_error() and friends add a newline after each line anyway, so avoid including it in the log strings

Use stdint.h macros instead of casts to print uint64_t values Casts are visually heavy, and can obscure unwanted truncations.

journal: add ability to list values a specified field can take in all entries of the journal The new 'unique' API allows listing all unique field values that a field specified by a field name can take in all entries of the journal. This allows answering queries such as "What units logged to the journal?", "What hosts have logged into the journal?", "Which boot IDs have logged into the journal?". Ultimately this allows implementation of tools similar to lastlog based on journal data. Note that listing these field values will not work for journal files created with older journald, as the field values are not indexed in older files.

journald: don't reposition window if we don't have to

journald: don't complain if fss key does not exist

journald: write tags also to user journal files

journal: initialize libgcrypt explicitly, before using HMAC

journal: automatically evolve FSS key even when nothing is logged

journal: add missing endianess conversion

journal: make libgcrypt dependency optional

journal: use a macro to check for file header flags

journal: don't write tag objects if nothing has been written since the last time

journal: rework terminology Let's clean up our terminology a bit. New terminology: FSS = Forward Secure Sealing FSPRG = Forward Secure Pseudo-Random Generator FSS is the combination of FSPRG and a HMAC. Sealing = process of adding authentication tags to the journal. Verification = process of checking authentication tags to the journal. Sealing Key = The key used for adding authentication tags to the journal. Verification Key = The key used for checking authentication tags of the journal. Key pair = The pair of Sealing Key and Verification Key Internally, the Sealing Key is the combination of the FSPRG State plus change interval/start time. Internally, the Verification Key is the combination of the FSPRG Seed plus change interval/start time.

journal: add FSPRG journal authentication

journal: parse fsprg seed

journalctl: add --verify-seed= switch to specify seed value

journal: split up journal-file.c